• Year
  • 1924
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 26846

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF with regeneration; 2 AF stage(s); Neutrodyne
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries / 4 & 80 & -4.5 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case, TUBES VISIBLE.
  • from Radiomuseum.org
  • Model: Ondolina [1924 - 2nd gen.] - SBR Société Belge Radio-
  • Shape
  • Tablemodel, slant panel.
  • Dimensions (WHD)
  • 435 x 235 x 260 mm / 17.1 x 9.3 x 10.2 inch
  • Notes
  • The early Ondolina 'desk' model was built from the end of 1923 up to 1927 and can be divided in 7 generations by the year of construction and significant differences per year.
    In the list below, given properties with each generation are changes with respect to the preceding generation.

    • Model 1924 (1st gen) has 3 connectors for the headphone or loudspeaker, one for each sound level depending on the number of amplifying tubes (2, 3 or 4). The power wires come out on the front. Reduction knobs (for fine tuning) on the primary and secondary tuning capacitors are optional.
    • Model 1924 (2nd gen) has only 2 connectors for headphone or loudspeaker. The middle one is replaced by a light bulb serving as fuse. There is an alternative tubeset: 4 x R5 or Marconi 'R' or Philips 'E'.
    • From model 1925 (1st gen) on, there is a volume switch instead of the light bulb and the power wires come out on the backpanel.
    • Model 1925 (2nd gen) is technically identical to model 1925 (1st gen) but has an aluminium front with black characters.
    • From model 1926 on, a reduction knob becomes standard on the secondary tuning capacitor (ratio 80:1), the other one is still optional. There are now 2 rheostats for the filaments: one for 2 tubes on the left and one for 2 tubes on the right.
      • There exists a special version of the model 1926, called Ondolina Réseau which is in fact a model 1926 with a built-in power supply, all in one cabinet.
    • Model 1927 (1st gen) , serial number up to 254913, has a front panel with silvery characters on brown background or black characters on brass background. Power wires are still on the backpanel and the internal negative grid voltage battery is still present as with all preceding generations.
    • Model 1927 (2nd gen) , serial number from 254913 and up, has power connectors on the backpanel instead of wires and no built-in negative grid voltage battery anymore. That negative voltage remains necessary but must be supplied by an external battery.

    These radios could also be used with an external power supply, type "Résolina" or type M30. In that case, the negative grid voltage battery is still necessary since power supplies couldn't provide that voltage. Also in that case, following tubes were recommended: A410 , A410 , A410 , A406 or B406 .

  • Price in first year of sale
  • 1,560.00 Bfr
  • External source of data
  • Ernst Erb

 Collections | Museums | Literature


The model Ondolina is part of the collections of the following members.


Forum contributions about this model: SBR Société Belge: Ondolina

Threads: 1 | Posts: 1

Dear SBR collectors,

In cooperation with the SBR Radiomuseum in Belgium a survey is made in order to find the production count of early SBR Ondolina (and Tubantia) receivers.

Already 52 early SBR Ondolina sets are registered, including their serial numbers and exact model type (e.g. Ondolina 24 first generation, serial#). The intermediate results (in the Dutch or French language) can be found here ( be found here http://users.telenet.be/sbrmuseum/big/registreer-01.htm.

To make this survey more accurate it is asked that every SBR Ondolina (and Tubantia) owner/collector sents an email with info of their set(s), at least serial number plus model number, to eeuwfeestpaleisje[A*T]telenet.be.


On behalf of the Belgium SBR Radiomuseum,
John Hupse

John Hupse † 28.9.20, 31.Oct.05

Weitere Posts (1) zu diesem Thema.